id: 74 yr ( 8, (3, 0, 0, 5)) (( 2.3, 2.5 ), ( 4.1, 1.4 ))
 +8                  |           +4 
                   |            
                   |         2017  
                   |            
    +    +    +    +    +    +  
                   |            
                   |  2011         
                   |            
                   |            
    +    +    +    +  2016 +    +  
                   |            
                   |            
                   |            
                   |            
    +    +    +    +    +    +  
                  |            
            2015      |            
                   |            
                   |            
    +    +    +    +    +    +  
                   |            
                   |            
  2014   2013 12     2018      |            
                   |            
    +    +    +    +    +    +  
                   |            
                   |            
                   |            
                   |            
 0---+----+----+----+----+----+--5